WHO COVID-19: case definitions: updated in Public health surveillance for COVID-19, 22 July 2022 22 July 2022 | Technical document Download (175.5 kB) Overview WHO COVID-19: Case Definitions Updated in Public health surveillance for COVID-19, 22 July 2022 WHO Team Emergency Preparedness (WPE) Editors World Health Organization Number of pages 1 Reference numbers WHO Reference Number: WHO/2019-nCoV/Surveillance_Case_Definition/2022.1 Copyright